Biology of Macrolophus caliginosus (Heteroptera: Miridae) Predator of Trialeurodes vaporariorum (Homoptera: Aleyrodidae)
- Mohd Z.
- Fauziah I.
- Wan W.A.K
- Che M.R.
- Kamaruzaman J.
AbstractMacrolophus caliginosus Wagner (Heteroptera: Miridae) is a highly polyphagous predatory bug, which has proven to
be effective in controlling many insect pests of greenhouse vegetables (eggplant, tomato, and cucumber) especially
whiteflies, aphids, and thrip. It is mainly used as a biological control auxiliary against T. vaporariorum Westwood
(Homoptera: Aleyrodidae). The greenhouse whitefly, Trialeurodes vaporariorum is particularly harmful to tomato
plants grown under the greenhouse. It has become prevalent whenever crops are frequently sprayed with insecticides.
Biological control is becoming important for controlling this insect pest. A mirid bug management programme has been
developed for an Integrated Pest Management (IPM) in tomato. The objective of the programme was to keep the
predator population densities high enough in order to maintain T. vaporariorum and other insect pest populations below
the economic threshold. In this study, it was very important to determine the biology of predator in term of its life cycle,
behaviour at different stages, fecundity, longevity and searching abilities, in order to provide detail data for formulating
the means of control against whitefly. Results of this study indicated that Macrolophus caliginosus adults fed on
whitefly larvae of all stages from the first larval stage to the pupal stage. The predator consumed the preys at almost
similar daily rates (average of 5.94 per day). The study implies that M. caliginosus, with its life cycle, predation,
longevity and fecundity and host preference, is a beneficial insect to combat against whitefly.
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